package _04多态案例;

public class KeyBoard implements Usb{
    @Override
    public void connect() {
        System.out.println("键盘连接了");
    }

    @Override
    public void exit() {
        System.out.println("键盘拔出了");
    }

    public void input(){
        System.out.println("键盘输入了");
    }
}
